From OpenSCADAWiki
Generic
The OpenSCADA project is an open-source software which developed and distributed mostly under GPL v.2 license then the work largely performs on the enthusiasm of professional developers, who do not receive direct compensation for it and pay for their work and efforts, based on self-interest and principles of the open source software. Each developer of the project OpenSCADA has self policy of participation into the project by its: giving time, holding parts of the project, condition of providing free support on the forum, etc.